By now, education observers are aware of New York City mayor Bill de Blasio’s incursion on the Big Apple’s charter sector. No one should be surprised; this was no ambuscade, no lying in wait. He publicly campaigned against charters. He actually called his predecessor’s policy of allowing charter public schools to share public-school space with district public schools “abhorrent.”

During his successful campaign for New York mayor, Bill de Blasio (D) made clear that he had a different, less favorable view of public charter schools than did his predecessor. But even charter advocates who feared the worst wouldn’t have predicted that Mr. de Blasio would kick a high-achieving charter school out of its building, leaving hundreds of parents wondering where their children will attend classes next fall.

The mayor and Chancellor Fariña are missing the crucial point that student learning matters most.

As lifelong liberals, and one of us the child of teachers, we have historically been suspicious of charter schools.  But now we find ourselves spending a lot of our free time defending the existence of these institutions or worrying what will happen if Mayor de Blasio gets his way and forces these schools to shut down.

My son George Reeder is in fifth grade at Harlem Success Academy 4. He’s part of the highest performing fifth grade class in the state. And yet, I have no idea where he’ll go to school next year.